A freight train is being assembled in a trainyard. So far there is one boxcar with a mass of 55,000 kg at rest on the track. Another boxcar, with a mass of 80,000 kg, moves along the track and impacts the first car. The couplings on the cars interlock and they move together at a velocity of 1.4 m/s. What was the velocity of the second car before it impacted the first car?

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A: The solution for the given question is given below :-

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